Tubular lantern.



C. L. BETTS.

TUBULAR LANTERN.

APPLIOATION FILED SEPT. 7, 1912.

UNITED STATES PAlTENT OFFICE.

CHARLES L. BETTS, 0F BROOKLYN, NEW YORK, ASSIGNOB T0 B. E. DIETZCOMPANY,

` OF NEW YORK, N. Y.

TUBULAR LANTERN.

Specification of Letters Patent.

Patented Sept. 16, 1913.

To ail whom it `may concern:

Be it known that I, CHARLES L. Bn'r'rs, a citizen of the United States,residing at Brooklyn, in the county of Kings and State of New York, haveinvented a new and useful Improvement in Tubular Lanterns, of which thefollowin is a specification.

This invention re ates to that class of tubular lanterns in which aglobe-holding chimney is arranged within the air chamber with which theupper ends of the tubes are connected, which chimney extends below thisair chamber and is provided near its lower end which bears upon theglobe with a row of air inlets.

The object ofthis invention is to provide the-chimney with means forincreasing the inflow' of air through these openings while preventingthe hot gases, which escape upwardly from the globe, from coming incontact with the chimney and overheating the same.

In the accompanying drawings: Figure 1 is an elevation, partly insection, of a tubular lantern rovided with this improve ment. Fig. 2 1sa fragmentary vertical section of the lower portion of the chimney on anenlarged scale. Fig. 3 is a vertical section showing a modifiedconstruction of the lantern top.

Like reference characters refer to like parts in the several figures.

Referring to Figs. 1 and 2, A represents the tubes, and B the upper airchamber of a tubular lantern of the cold blast type. C represents theglobe. D represents the globe-holding chimney which is arranged with itsupper contracted portion 10 in the lower portion of the air chamber Band is provided below that chamber with a downwardly Haring portion 11which bears upon the globe and is provided near its lower end with anannular row of air inlet openings 12. The chimney is held down upon theglobe by any suitable means, for instance, a transverse lifter shaft 13.The chimney is arranged with its upper end near the mouths of the airtubes, and the air chamber is surmounted by a cap 14 having outlets 15for the products of combustion above the inwardly projecting top "flange16 of the air chamber. 17 represents a deflecting ring arranged in thelower portion of the chimney on the inner side of the air inlet openings12. This delecting ring is secured with its lower end t-o the lower endof the flaring portion 11 of the chimney and extends obllquely inwardlyand upwardly therefrom, approximately to the height of the air inletopenings. This defiecting ring prevents air currents which enter throughthe openings 12 from blowing across the top of the globe and deflectssuch air currents upwardly along the flaring port-ion of the chimney,thereby maintaining an annular layer or envelop of cool outside airalong the inner surface of the chimney which confines the hot gasesescaping upwardly from the lglobe and prevents the same from coming incontact with the chimney and overheating and cliscoloring the same. Thisupwardly flowing layer of cool air eventually mingles to a certainextent with the hot globe gases flowing upwardly through the chimney,and this mlxture of air and gases passes from the latter into the upperportion of the air chamber from which part of this mixture passes to thetubes. The current of hot globe gases flowing upwardly from the globethrough the deflecting ring operates in the manner of an injector andaccelerates and promotes the induction of cold outside air through theopenings 12 into the chimney.

In the construction of the lantern top represented in Fig. 3, thechimney D is cylindrical and held down upon the globe by a spring 18,which surrounds the lifter bar 19 connected with the chimney.

I claim as my invention:

1. In a tubular lantern, the combination with an air chamber with whichthe upper ends of the tubes are connected, a globe, and a chimneyarranged with its upper portion within said chamber and extending belowthe same to the globe, said chimney having an annular row of air inletsnear its lower end, of a deflecting ring arranged within the lowerportion of said chimney on the inner side of said inlets and having itsupper edge arranged adjacent to the upper edges of saidopenings,substantially as set forth.

2. yIn a tubular lantern, the combination with Van air chamber withwhich the upper ends of the tubes are connected, of a chimney arrangedwithin said chamber having its upper end arranged adjacent to themouthsof the air tubes and its lower portion below said chamber providedwith an annular row of air inlets, and a deflecting ,said inlets,substantially as setforth.

3. In a tubular lantern, the combination with an air chamber with whichthe upper ends of the tubes are connected, a globe, and

a chimney arranged with its upper portion Within said chamber andextending below the same to the globe, said chimney having an annularrow of air inlets near its lower end, of an oblique deflecting ringarranged within the lower portion of said chimney on the inner side ofsaid inlets and extending upwardly and inwardly over the upper end 'ofthe globe, substantially as set forth.

4. In a tubular lantern, the combination with an air chamber with whichthe upper ends'of the tubes are connected, a globe, :1 -nd a chimneyarranged with its'upper portlon within said chamber and having adownwardly-flaring bottom portion which bears upon the globe and whichis provided 'near its lower end with an annular row of air inlets, of anoblique deflecting ring arranged within said flaring lower portion ofthe chimney and extending upwardly and inwardly on the inner side ofsaid inlets and terminating approximately at the level thereof,substantially as set forth.

Witness my hand 'this 31st day of Au gust, i912.

CHARLES L. BETTS.

Witnesses: r

ROBERT A. CURRIE, HOWARD lL. FLETCHER.

